From the study of adolescent clinical cases we tried to identify the symbolic apparatus of contemporary language, regarding the construction of identity. The technologies currently available are used by adolescents as elements of alterity, where the affirmation of sexuality fades behind "prostheses of language". Once theses values are incorporated, they do not hinder the appearance of primal fears, revealing particular paradigms and paradoxes. In the assembly where the adolescent produces his/her image, the prostheses appear as protecting the drive, as well as an erotic authorization of identity anguish.